package cn.turing.firecontrol.datahandler.util;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

public class ApplicationContextUtil {
    private static ApplicationContext applicationContext = null;

        // 非@import显式注入，@Component是必须的，且该类必须与main同包或子包

        // 若非同包或子包，则需手动import 注入，有没有@Component都一样

        // 可复制到Test同包测试
    public static void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        if (ApplicationContextUtil.applicationContext == null) {
            ApplicationContextUtil.applicationContext = applicationContext;
        }
    }

        //获取applicationContext

    public static ApplicationContext getApplicationContext() {

        return applicationContext;

    }

        //通过name获取 Bean.

    public static Object getBean(String name) {
        return getApplicationContext().getBean(name);
    }

        //通过class获取Bean.

    public static <T> T getBean(Class<T> clazz) {

        return getApplicationContext().getBean(clazz);
    }
        //通过name,以及Clazz返回指定的Bean

    public static <T> T getBean(String name, Class<T> clazz) {

        return getApplicationContext().getBean(name, clazz);
    }



}
